Download DA_06A Manual - ACCES I/O Products, Inc.

ACCES I/O PRODUCTS INC
10623 Roselle Street, San Diego, CA 92121
TEL (858)550-9559 FAX (858)550-7322
MODEL D/A-06A
USER MANUAL
FILE: MDA06A.E2b
Notice
The information in this document is provided for reference only. ACCES does not assume any liability arising
out of the application or use of the information or products described herein. This document may contain or
reference information and products protected by copyrights or patents and does not convey any license under
the patent rights of ACCES, nor the rights of others.
IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation.
Printed in USA. Copyright 1995 by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA 92121.
All rights reserved.
Pageiii
Warranty
Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications. However,
should equipment failure occur, ACCES assures its customers that prompt service and support will be
available. All equipment originally manufactured by ACCES which is found to be defective will be repaired
or replaced subject to the following considerations.
Terms and Conditions
If a unit is suspected of failure, contact ACCES' Customer Service department. Be prepared to give the unit
model number, serial number, and a description of the failure symptom(s). We may suggest some simple tests
to confirm the failure. We will assign a Return Material Authorization (RMA) number which must appear on
the outer label of the return package. All units/components should be properly packed for handling and
returned with freight prepaid to the ACCES designated Service Center, and will be returned to the
customer's/user's site freight prepaid and invoiced.
Coverage
First Three Years: Returned unit/part will be repaired and/or replaced at ACCES option with no charge for
labor or parts not excluded by warranty. Warranty commences with equipment shipment.
Following Years: Throughout your equipment's lifetime, ACCES stands ready to provide on-site or in-plant
service at reasonable rates similar to those of other manufacturers in the industry.
Equipment Not Manufactured by ACCES
Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the
terms and conditions of the respective equipment manufacturer's warranty.
General
Under this Warranty, liability of ACCES is limited to replacing, repairing or issuing credit (at ACCES
discretion) for any products which are proved to be defective during the warranty period. In no case is
ACCES liable for consequential or special damage arriving from use or misuse of our product. The customer
is responsible for all charges caused by modifications or additions to ACCES equipment not approved in
writing by ACCES or, if in ACCES opinion the equipment has been subjected to abnormal use. "Abnormal
use" for purposes of this warranty is defined as any use to which the equipment is exposed other than that use
specified or intended as evidenced by purchase or sales representation. Other than the above, no other
warranty, expressed or implied, shall apply to any and all such equipment furnished or sold by ACCES.
Page iv
Table of Contents
Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii
Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Chapter 2: Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
CD Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5-Inch Diskette Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Directories Created on the Hard Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
2-1
2-2
2-4
Chapter 3: Option Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Analog Output Mode, Voltage or Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Analog Output Update Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Chapter 4: Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Chapter 5: Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Chapter 6: Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Programming the D/A-06A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Chapter 7: Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Chapter 8: Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Appendix A: PPI Data Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Page v
List of Figures
Figure 1-1: D/A-06A Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure 3-2: D/A-06A Option Selection Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
List of Tables
Table 3-1:
Table 3-2:
Table 4-1:
Table 4-2:
Table 4-3:
Table 5-1:
Table 8-1:
Page vi
Selecting Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Current Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Address Assignments for PC and PC/XT Computers . . . . . . . . . . . . .
Standard Address Assignments for 286/386/486 Computers . . . . . . . . . . . . . . .
Example of Address Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D/A-06A I/O Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3-2
4-1
4-2
4-3
5-1
8-1
Chapter 1: Introduction
The D/A-06A is a full-size card that can be installed in long slots of PC/XT/AT class computers. It
contains six digital-to-analog converters (DAC) and twenty-four programmable digital I/O channels.
Each analog output channel can be independently configured for voltage ranges of:
0V to +5V
0V to +10V
-2.5V to +2.5V
-5V to +5V
-10V to +10V
Or for current ranges of:
1mA to 5mA
4mA to 20mA
With the addition of one resistor per channel the analog outputs can also be configured for a current
range of 0mA to 50mA.
All analog output channels have double-buffered inputs for single-step update and each is addressed
at its own I/O location. Analog output channels can be user-selected to provide simultaneous updating
by either software or external signal. That updating is user-assignable in pairs of channels or all DAC
channels can be updated simultaneously.
Digital I/O channels are provided from a type 8255 Programmable Peripheral Interface chip (PPI). The
8255 PPI is a general purpose programmable I/O device. It provides 24 bits of digital I/O and may be
programmed for three major modes of operation.
In MODE 0 each group of 24 I/O pins may be programmed to be input or output in sets of eight for
ports A and B and in sets of four for port C. In MODE 1, each group may be programmed to have
eight lines of input or output. Of the remaining four pins, three are used for handshaking and interrupt
control signals. In MODE 2, eight lines are used for bi-directional bus and five lines are used for
handshaking. A detailed description of the 8255 PPI is contained in Appendix A.
Manual MDA06A.E2b
Page 1-1
D/A-06A Manual
Specifications
Analog Outputs
•
•
•
•
Resolution:
12 bits (0 to 4095 decimal)
Channels:
Six
Voltage Output Ranges at 5mA max.:
0.0 to 5.0 VDC
0.0 to 10.0 VDC
-2.5 to +2.5 VDC
-5.0 to +5.0 VDC
-10.0 to +10.0 VDC
Current Output Ranges with excitation voltage (8 - 36) VDC:
1 to 5 mA
4 to 20 mA
0 to 50 mA *
*:Addition of one 167 ohm resistor per
channel is required. See Chapter 3, Option Selection.
Digital to Analog Converter
•
•
•
•
•
•
•
AD-7537 monolithic chip, double buffered, right justified.
Data Format:
Right-justified, two bytes (8LSB's and 4MSB's).
Relative Accuracy:
+/- 1 LSB (includes nonlinearity).
Monotonicity:
Guaranteed over operating temperature range.
Settling time:
4 usec to 0.01% for full scale step input.
Offset Temperature Drift:
+/- 1 ppm/ °C. typ.
+/- 3 ppm/ °C. max.
Gain Temperature Drift:
+/- 1 ppm/ °C. typ.
+/- 5 ppm/ °C. max.
Page 1-2
Manual MDA06A.E2b
Digital Inputs/Outputs
•
•
•
•
24 programmable digital input/ output lines. (Ports A, B, C lo, and C hi).
8255 PPI Controller. All modes supported.
Inputs TTL, DTL, CMOS compatible:
Logic Low: -0.5V to +0.8V.
Logic High: +2.0V to +5.0V.
Load Current: 10 uA.
Outputs TTL, DTL, CMOS compatible:
Logic Low: 0.45V max. at 1.7mA sink current.
Logic High: 2.4V min. at -200uA source current.
1.5V min. at -1mA source current (Darlington drive not available from Port A).
Power Requirements
•
•
•
+5 VDC at 500mA max.
+12 VDC at 70mA max.
-12 VDC at 60mA max.
Environmental
•
•
•
•
Operating Temperature: 0 °C. to +60 °C.
Storage Temperature:
-20 °C. to +85 °C.
Humidity:
5% to 95% non condensing.
Size:
13.375 inches. Install in a full-size slot.
Manual MDA06A.E2b
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D/A-06A Manual
Figure 1-1: D/A-06A Block Diagram
Page 1-4
Manual MDA06A.E2b
Chapter 2: Installation
The software provided with this card is contained on either one CD or multiple diskettes and must be
installed onto your hard disk prior to use. To do this, perform the following steps as appropriate for
your software format and operating system. Substitute the appropriate drive letter for your CD-ROM
or disk drive where you see d: or a: respectively in the examples below.
CD Installation
DOS/WIN3.x
1.
2.
3.
4.
Place the CD into your CD-ROM drive.
Type d:K to change the active drive to the CD-ROM drive.
Type installK to run the install program.
Follow the on-screen prompts to install the software for this card.
WIN95/98/NT
a.
b.
c.
Place the CD into your CD-ROM drive.
The CD should automatically run the install program after 30 seconds. If the install program
does not run, click START | RUN and type d:install, click OK or press K.
Follow the on-screen prompts to install the software for this card.
3.5-Inch Diskette Installation
As with any software package, you should make backup copies for everyday use and store your
original master diskettes in a safe location. The easiest way to make a backup copy is to use the DOS
DISKCOPY utility.
In a single-drive system, the command is:
diskcopy a: a:K
You will need to swap disks as requested by the system.
In a two-disk system, the command is:
diskcopy a: b:K
This will copy the contents of the master disk in drive A to the backup disk in drive B.
Manual MDA06A.E2b
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D/A-06A Manual
To copy the files on the master diskette to your hard disk, perform the following steps.
1.
Place the master diskette into a floppy drive.
2.
Change the active drive to the drive that has the diskette installed. For example, if the diskette
is in drive A, type a:K.
3.
Type installK and follow the on-screen prompts.
Directories Created on the Hard Disk
The installation process will create several directories on your hard disk. If you accept the installation
defaults, the following structure will exist.
[CARDNAME]
Root or base directory containing the SETUP.EXE setup program used to help you configure jumpers
and calibrate the card.
DOS\PSAMPLES:
DOS\CSAMPLES:
Win32\language:
A subdirectory of [CARDNAME] that contains Pascal samples.
A subdirectory of [CARDNAME] that contains "C" samples.
Subdirectories containing samples for Win95/98 and NT.
WinRisc.exe
A Windows dumb-terminal type communication program designed for RS422/485 operation.
Used primarily with Remote Data Acquisition Pods and our RS422/485 serial communication
product line. Can be used to say hello to an installed modem.
ACCES32
This directory contains the Windows 95/98/NT driver used to provide access to the hardware registers
when writing 32-bit Windows software. Several samples are provided in a variety of languages to
demonstrate how to use this driver. The DLL provides four functions (InPortB, OutPortB, InPort, and
OutPort) to access the hardware.
This directory also contains the device driver for Windows NT, ACCESNT.SYS. This device driver
provides register-level hardware access in Windows NT. Two methods of using the driver are
available, through ACCES32.DLL (recommended) and through the DeviceIOControl handles provided
by ACCESNT.SYS (slightly faster).
Page 2-2
Manual MDA06A.E2b
SAMPLES
Samples for using ACCES32.DLL are provided in this directory. Using this DLL not only makes
the hardware programming easier (MUCH easier), but also one source file can be used for both
Windows 95/98 and WindowsNT. One executable can run under both operating systems and still
have full access to the hardware registers. The DLL is used exactly like any other DLL, so it is
compatible with any language capable of using 32-bit DLLs. Consult the manuals provided with
your language's compiler for information on using DLLs in your specific environment.
VBACCES
This directory contains sixteen-bit DLL drivers for use with VisualBASIC 3.0 and Windows 3.1 only.
These drivers provide four functions, similar to the ACCES32.DLL. However, this DLL is only
compatible with 16-bit executables. Migration from 16-bit to 32-bit is simplified because of the
similarity between VBACCES and ACCES32.
PCI
This directory contains PCI-bus specific programs and information. If you are not using a PCI card,
this directory will not be installed.
SOURCE
A utility program is provided with source code you can use to determine allocated resources at
run-time from your own programs in DOS.
PCIFind.exe
A utility for DOS and Windows to determine what base addresses and IRQs are allocated to installed
PCI cards. This program runs two versions, depending on the operating system. Windows 95/98/NT
displays a GUI interface, and modifies the registry. When run from DOS or Windows3.x, a text
interface is used. For information about the format of the registry key, consult the card-specific
samples provided with the hardware. In Windows NT, NTioPCI.SYS runs each time the computer
is booted, thereby refreshing the registry as PCI hardware is added or removed. In Windows 95/98/NT
PCIFind.EXE places itself in the boot-sequence of the OS to refresh the registry on each power-up.
This program also provides some COM configuration when used with PCI COM ports. Specifically,
it will configure compatible COM cards for IRQ sharing and multiple port issues.
WIN32IRQ
This directory provides a generic interface for IRQ handling in Windows 95/98/NT. Source code is
provided for the driver, greatly simplifying the creation of custom drivers for specific needs. Samples
are provided to demonstrate the use of the generic driver. Note that the use of IRQs in near-real-time
data acquisition programs requires multi-threaded application programming techniques and must be
considered an intermediate to advanced programming topic. Delphi, C++ Builder, and Visual C++
samples are provided.
Manual MDA06A.E2b
Page 2-3
D/A-06A Manual
Findbase.exe
DOS utility to determine an available base address for ISA bus , non-Plug-n-Play cards. Run this
program once, before the hardware is installed in the computer, to determine an available address to
give the card. Once the address has been determined, run the setup program provided with the
hardware to see instructions on setting the address switch and various option selections.
Poly.exe
A generic utility to convert a table of data into an nth order polynomial. Useful for calculating
linearization polynomial coefficients for thermocouples and other non-linear sensors.
Risc.bat
A batch file demonstrating the command line parameters of RISCTerm.exe.
RISCTerm.exe
A dumb-terminal type communication program designed for RS422/485 operation. Used primarily
with Remote Data Acquisition Pods and our RS422/485 serial communication product line. Can be
used to say hello to an installed modem. RISCTerm stands for Really Incredibly Simple
Communications TERMinal.
Installing the Card
Before carefully read the chapters on Address Selection and Option Selection of this manual and
configure the card according to your requirements. Use the FINDBASE program provided with the
card to select the base address for the card. Use the program called SETUP to select other options
such as ranges, update mode, etc.
Be especially careful with address selection. If the addresses of two installed functions overlap, you
will experience unpredictable computer behavior.
To Install the Card
1.
2.
3.
4.
5.
6.
7.
8.
Remove power from the computer.
Remove the computer cover.
Remove blank I/O backplate.
Install jumpers for selected options. See Option Selection, Chapter 3.
Select the base address on the card. See Address Selection, Chapter 4.
Install the card in an I/O expansion slot. Important: Make sure that the card mounting bracket
is properly screwed into place and that there is a positive chassis ground.
Inspect for proper fit of the card and cables and tighten screws.
Replace the computer cover.
Page 2-4
Manual MDA06A.E2b
To ensure that there is minimum susceptibility to EMI and minimum radiation, it is important that
there be a positive chassis ground. Also, proper EMI cabling techniques (cable connect to chassis
ground at the I/O connector, twisted-pair wiring, and, in extreme cases, ferrite level of EMI protection)
must be used for input/output wiring.
CE-marked versions of D/A-06A meet the requirements of EN50081-1:1992 (Emissions),
EN50082-1:1992 (Immunity), and EN60950:1992 (Safety).
Manual MDA06A.E2b
Page 2-5
D/A-06A Manual
Page 2-6
Manual MDA06A.E2b
Chapter 3: Option Selection
Refer to the Block Diagram and Option Selection Map when reading this section. Card operation is
determined by jumper installation and switch settings as described in the following paragraphs.
Analog Output Mode, Voltage or Current
Each analog output channel can be configured as a voltage or current output by installation of jumpers
in locations marked V0 through V5, or I0 through I5.
Output Ranges
The output ranges are individually selected for each analog output channel 0 through 5
individually by corresponding switches S0 through S5. The following tables list switch settings for
the desired output range.
Analog Output
Voltage Range
Switch Position
1
2
3
4
5
6
0 to 5V
ON
OFF
OFF
OFF
ON
OFF
0 to 10V
OFF
ON
OFF
OFF
ON
OFF
-2.5 to +2.5V
ON
OFF
OFF
ON
ON
OFF
-5 to +5V
ON
OFF
OFF
ON
OFF
OFF
-10 to +10V
OFF
ON
OFF
ON
OFF
OFF
Table 3-1: Selecting Voltage Range
Jumper in "V" Position
Manual MDA06A.E2b
Page 3-1
D/A-06A Manual
Analog Output
Current Range
Switch Position
1
2
3
4
5
6
1-5 mA
ON
OFF
ON
OFF
ON
OFF
4-20 mA
ON
OFF
ON
OFF
ON
ON
0-50 mA*
ON
OFF
OFF
OFF
ON
ON
*Signifies option requiring addition of one 118 ohm resistor per channel:
Table 3-2: Selecting Current Range
Add R7a for channel AO0;
Add R17a for channel AO1;
Add R27a for channel AO2;
Add R37a for channel AO3
Add R47a for channel AO4
Add R57a for channel AO5
Jumper in "I" Position
*
Excitation Voltage up to 60V is OK on low current ranges. Minimum voltage of 8V must be
maintained for correct operation.
Caution
Do not connect current loops to a DAC that is set to voltage mode. The loop supply can cause
irreversible damage to the DAC.
Page 3-2
Manual MDA06A.E2b
Analog Output Update Mode
The analog-output update mode is selected by six-position DIP switch S6. Labels printed alongside
the switch facilitate selection. Switches are enabled when placed in the ON position.
Three analog-output update modes are available: (a) Individual update of each channel upon high-byte
Write, (b) Simultaneous update of all selected channels upon Read of any digital-to-analog converter
address, and (c) Simultaneous update of all selected channels upon receipt of an external signal.
EX1, SM1 Control analog output channels A0 and A1;
EX2, SM2 Control analog output channels A2 and A3;
EX3, SM3 Control analog output channels A4 and A5;
SM
Software-directed simultaneous-update mode: update happens on any analog output
address read.
EX
Update on external pulse or on a low transition. If this update mode is selected, the
external signal should be wired to the output connector pins 25, 24, and 23. These
pins are allocated to Digital I/O port bits C4,5,6 and will be shared in this mode,
which implies that 8255 PPI port C HI should be programmed either as an input or
disabled.
The external update can be disabled or enabled by three additional digital I/O lines
allocated to port C bits 0,1, and 2. These lines might be controlled externally, or
through the 8255 PPI if port C HI is selected as an output.
NONE
Manual MDA06A.E2b
If switches are de-selected, update will happen automatically on second (high) byte
Write to the digital-to-analog converter.
Page 3-3
D/A-06A Manual
Figure 3-2: D/A-06A Option Selection Map
Page 3-4
Manual MDA06A.E2b
Chapter 4: Address Selection
Refer to Item 1, "Set Board Address" on the D/A-06A card Setup program provided. The card
requires 16 consecutive address locations in I/O space. The starting, or base, address can be selected
anywhere within the I/O address range 100-3F0 hex (except 1F0 through 1F8) for AT's and 200
through 3F0 for XT's, providing that the address does not overlap with other functions. If in doubt,
refer to the Tables below for a list of standard address assignments. The Base Address Locator
program FINDBASE provided on CD will assist you in selecting the base address that will avoid this
conflict
Hex Range
000-00F
020-021
040-043
060-063
080-083
0AX
0CX
0EX
100-1FF
200-20F
210-217
220-24F
278-27F
2F0-2F7
2F8-2FF
300-31F
320-32F
378-37F
380-38C**
380-389**
3A0-3A9
3B0-3BF
3C0-3CF
3D0-3DF
3E0-3E7
3F0-3F7
3F8-3FF
Usage
DMA Chip 8237A-5
Interrupt 8259A
Timer 8253-5
PPI 8255A-5
DMA Page Register
NMI Mask Register
Reserved
Reserved
Not Usable
Game Control
Expansion Unit
Reserved
Reserved
Reserved
Asynchronous Comm. (Secondary)
Prototype Card
Fixed Disk
Printer
SDLC Communications
Binary Synchronous Comm. (Secondary)
Binary Synchronous Comm. (Primary)
IBM Monochrome Display/Printer
Reserved
Color/Graphics
Reserved
Diskette
Asynchronous Comm. (Primary)
** These options can not be used together - addresses overlap
Table 4-1: Standard Address Assignments for PC and PC/XT Computers
Manual MDA06A.E2b
Page 4-1
D/A-06A Manual
Hex Range
000-01F
020-03F
040-05F
060-06F
070-07F
080-09F
0A0-0BF
0C0-0DF
0F0
0F1
0F8-0FF
1F0-1F8
200-207
278-27F
2F8-2FF
300-31F
360-36F
378-37F
380-38F
3A0-3AF
3B0-3BF
3C0-3CE
3D0-3DF
3F0-3F7
3F8-3FF
Usage
DMA Controller 1
INT Controller 1, Master
Timer
8042 (Keyboard)
Real Time Clock, NMI Mask
DMA Page Register
INT Controller 2
DMA Controller 2
Clear Math Coprocessor Busy
Reset Coprocessor
Arithmetic Processor
Fixed Disk
Game I/O
Parallel Printer Port 2
Asynchronous Comm'n (Secondary)
Prototype Card
Reserved
Parallel Printer Port 1
SDLC or Binary Synchronous Comm'n 2
Binary Synchronous Comm'n 1
Monochrome Display/Printer
Local Area Network
Color/Graphic Monitor
Floppy Diskette Controller
Asynchronous Comm'n (Primary)
Table 4-2: Standard Address Assignments for 286/386/486 Computers
The base address is set by a DIP switch which controls address bits A4 through A9. In order to select
the base address, convert the desired address to binary. Then for each "1" of the binary address, set
the corresponding DIP switch to OFF, and for each "0" of the binary address set the corresponding
switch to ON.
For example, to program a base address of hex 300, DIP switches A9 and A8 are set to the "OFF"
position, while switches A7 through A4 are set to the "ON" position.
The following example illustrates this process in detail: In this case, switch selection corresponds to
binary 10 1101 xxxx (or hex 2D0). The "xxxx" represents address lines A3, A2, A1, and A0 used on
the card to select individual registers. See Chapter 5, Programming.
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Manual MDA06A.E2b
Address Line Controlled
A9
A8
A7
A6
A5
A4
Switch Label
A9
A8
A7
A6
A5
A4
OFF
ON
OFF
OFF
ON
OFF
Binary Representation
1
0
1
1
0
1
Conversion Factors
2
1
8
4
2
1
Setup
Hex Representation
2
D
Table 4-3: Example of Address Selection
Review the Address Selection Reference Table carefully before selecting card address. If the addresses
of two installed functions overlap, you will experience unpredictable computer behavior.
Manual MDA06A.E2b
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Manual MDA06A.E2b
Chapter 5: Programming
The D/A-06A card uses 16 consecutive I/O addresses. The I/O address map is as follows:
Address
Write
Read
Base Address
AO #0 Low Byte**
Simultaneous Update*
Base Address +1
AO #0 High Byte**
Simultaneous Update*
Base Address +2
AO #1 Low Byte**
Simultaneous Update*
Base Address +3
AO #1 High Byte**
Simultaneous Update*
Base Address +4
AO #2 Low Byte**
Simultaneous Update*
Base Address +5
AO #2 High Byte**
Simultaneous Update*
Base Address +6
AO #3 Low Byte**
Simultaneous Update*
Base Address +7
AO #3 High Byte**
Simultaneous Update*
Base Address +8
AO #4 Low Byte**
Simultaneous Update*
Base Address +9
AO #4 High Byte**
Simultaneous Update*
Base Address +10
AO #5 Low Byte **
Simultaneous Update*
Base Address +11
AO #5 High Byte**
Simultaneous Update*
Base Address +12
Dig. I/O Port A
Dig. I/O Port A
Base Address +13
Dig. I/O Port B
Dig. I/O Port B
Base Address +14
Dig. I/O Port C
Dig. I/O Port C
Base Address +15
Dig. I/O Control***
Illegal
Table 5-1: D/A-06A I/O Address Map
*
Analog output pairs selected by Analog Output Update switch will be simultaneously
updated. See Chapter 3, Option Selection - Analog Outputs Update.
**
Data are written to the digital to analog converter in right-justified format; i.e.,
***
The Digital I/O Control Register is used to select the MODE of operation and to configure
the 8255 PPI ports A, B, C HI and C LO.
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BIT
D7
D6
D5
D4
D3
D2
D1
D0
Low
B5
B6
B7
B8
B9
B10
B11
B12
High
X
X
X
X
B1
B2
B3
B4
For UNIPOLAR ranges:
0000 0000 0000 =
ZERO
1000 0000 0000 =
1/2 SCALE
1111 1111 1111 =
FULL SCALE
|
|
MSB (or B1) <---- |
|----> LSB (or B12)
For BIPOLAR ranges:
0000 0000 0000 =
- FULL SCALE
1000 0000 0000 =
ZERO
1111 1111 1111 =
+ FULL SCALE
|
|
MSB (or B1) <---- |
|----> LSB (or B12)
D7 D6, D5 D4D3D2D1D0-
Mode set flag
Mode selection:
Port A:
Port C upper:
Mode selection:
Port B:
Port C lower:
00 = Mode 0, 01 = Mode 1, 1X = Mode 2
1 = input, 0 = output
1 = input, 0 = output
1 = Mode 1, 0 = Mode 0
1 = input, 0 = output
1 = input, 0 = output
For details of 8255 PPI operation, see Appendix A.
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Manual MDA06A.E2b
Chapter 6: Software
The CD provided with D/A-06A contains a setup and calibration program, sample programs and 16and 32-bit utility drivers. The first sample program demonstrates how to generate a desired analog
voltage output. The second program is more complex. It demonstrates how to generate sine,
triangular, and sawtooth waveforms.
Setup Program
The file name of the setup program is SETUP. This program is supplied as a tool for you to use in
configuring switches and jumpers on the card. It is menu-driven and provides a picture of the card on
the computer monitor to help you locate the switch or jumper locations. You make simple keystrokes
to select the functions. The picture on the computer monitor changes to show how the switches or
jumpers should be placed to effect your choices.
Programming the D/A-06A
The D/A-06A card is straightforward to program. For example, the following C procedure could be
used:
To output an analog value with 12-bit resolution, a corresponding decimal number N between 0 and
4095 is calculated (2^12=4095).
N/4095= V(out)/V(full scale)
Then the number is split between high and low bytes as follows:
H= (int)(N/256);
L = N - (H * 256);
Next the data are written to the selected analog output channel. (See I/O Address Map.) In this
example, we will assume analog output 0 (AO 0) :
OUTPORTB (BASE + 0, L);
OUTPORTB (BASE + 1, H);
For simplicity it was assumed that the Simultaneous Address Update switch is de-selected. Analog
output 0 will change upon Write of high byte to (BASE + 1).
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If the Simultaneous Address Update switch is used to select simultaneous software update (SM1,2,3
switches selected), then a Read from any address between BASE and BASE + 11 will cause the
output to be updated.
A = INPORTB (BASE + 0);
If External update is selected by the Simultaneous Address Update switch (EX1,2,3 switches selected),
then update will wait for an external low-going transition on I/O connector pin 25 (AO 0 and AO 1),
pin 24 (AO 2 and AO 3), and pin 23 (AO 4 and AO 5).
Mixing all update modes is allowed.
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Manual MDA06A.E2b
Chapter 7: Calibration
Quick and easy calibration of the D/A-06A card can be done by using a menu-driven program on the
Board Setup and Calibration CD provided. Calibration is required whenever an analog output range
is changed. In addition, periodic calibration of the card is recommended if it is used in extreme
environmental conditions. The D/A-06A card uses very stable components but vibration or high/low
temperature cycles might result in slight analog output errors.
Factory calibration and periodic calibration of the card includes adjustment of reference voltages
+10V, +5V, and -2.5V. However, there is no need to perform that part of the calibration procedure
if only changing ranges.
To calibrate the D/A-06A card, run the Setup program and follow the screen prompts.
1.
2.
3.
4.
5.
Select the card options and base address and install the card in the computer.
Measure the 10V reference voltage at the test point labeled +10V and adjust RP15, the
10-turn potentiometer marked +10V, until the voltage is 10.000 V. You will find a convenient
GND test point immediately above U25. (There is no need to perform this step of the
calibration procedure when changing ranges.)
Measure the +5V reference voltage at the test point labeled +5V and adjust RP14, the
potentiometer marked +5V until the voltage is +5.0000 V. (There is no need to perform this
step of the calibration procedure when changing ranges.)
Measure the -2.5V reference voltage at the test point labeled -2.5V and adjust RP13, the
potentiometer marked -2.5V, until the voltage is -2.5000 V. (There is no need to perform this
step of the calibration procedure when changing ranges.)
Select the DAC channel that you wish to calibrate or change range. Set the appropriate
Output Range DIP Switch to the positions indicated by the computer display for the range that
you desire. Measure the analog output voltage between the appropriate pin of the I/O
Connector and Analog Ground I/O Connector Pin 13.
Manual MDA06A.E2b
Channel
I/O Pin
AO 0
18
AO 1
16
AO 2
14
AO 3
12
AO 4
2
AO 5
1
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D/A-06A Manual
6.
7.
8.
9.
Select the "Set Offset" menu item in the computer display. Measure the DAC output voltage
and adjust the 15-turn potentiometer marked OFFSET (for that DAC channel) until the
output value is at minus full scale (or zero volts if a unipolar range was selected).
Select the "Set Gain" menu item in the computer display. Measure the DAC output voltage,
and adjust the 15-turn potentiometer marked GAIN (for that DAC channel) until the output
value is at plus full scale.
Repeat the steps 6 and 7 above to verify calibration.
Select the "Check Mid Scale" menu item in the computer, display. Measure the output
voltage, and verify that the output value is correct.
Calibration should be done on the range that will be used. No attempt at calibration should be made
in noisy locations or with a noisy calibration setup.
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Manual MDA06A.E2b
Chapter 8: Connector Pin Assignments
The analog and digital I/O signals are connected via a 37 pin D-type connector that extends through
the back of the computer case. The mating connector is AMP type 747304-1 or equivalent.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
Name
AO5
AO4
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
DIG COM
AO3
RTN3
AO2
RTN2
AO1
RTN1
AO0
RTN0
RTN5
RTN4
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Function
Analog Output Channel 5
Analog Output Channel 4
Digital I/O Port B Bit 7
Digital I/O Port B Bit 6
Digital I/O Port B Bit 5
Digital I/O Port B Bit 4
Digital I/O Port B Bit 3
Digital I/O Port B Bit 2
Digital I/O Port B Bit 1
Digital I/O Port B Bit 0
Digital Common (Ground)
Analog Output Channel 3
Ground for Analog Channel 3
Analog Output Channel 2
Ground for Analog Channel 2
Analog Output Channel 1
Ground for Analog Channel 1
Analog Output Channel 0
Ground for Analog Channel 0
Ground for Analog Channel 5
Ground for Analog Channel 4
Digital I/O Port C Bit 7
Digital I/O Port C Bit 6 (Ext. Update 3)
Digital I/O Port C Bit 5 (Ext. Update 2)
Digital I/O Port C Bit 4 (Ext. Update 1)
Digital I/O Port C Bit 3
Digital I/O Port C Bit 2 (Ext. Update 3)
Digital I/O Port C Bit 1 (Ext. Update 2)
Digital I/O Port C Bit 0 (Ext. Update 1)
Digital I/O Port A Bit 7
Digital I/O Port A Bit 6
Digital I/O Port A bit 5
Digital I/O Port A Bit 4
Digital I/O Port A Bit 3
Digital I/O Port A Bit 2
Digital I/O Port A Bit 1
Digital I/O Port A Bit 0
Table 8-1: Connector Pin Assignments
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Manual MDA06A.E2b
Appendix A: PPI Data Sheets
The data sheet in this Appendix is provided to help your understanding of the 8255-5 PPI which is
made by a number of companies. These sheets are reprinted with permission of Mitsubishi Electric
Corp. (Copyright 1987).
The information, diagrams, and all other data included are believed to be correct and reliable.
However, no responsibility is assumed by Mitsubishi Electric Corporation for their use, nor for any
infringements of patents or other rights belonging to third parties which may result from their use.
Values shown on these data sheets are subject to change for product improvement.
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Customer Comments
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